Reinforced-concrete building.



Patented Nov. 1-1, 1913.

2 SHEETS-SHEET 1.

VV. P. COWLES.

REINFORGED CONCRETE BUILDING. APPLICATION FILED NOV. 26. 1910.

W.- P. COWLES.

RBINFORGED CONCRETE BUILDING. APPLIOATION FILED NOV. 26. 1910.

1,078,575. Y Patented Nov. 11, 1913.

2 SHEETS-SHEET Z.

f winnaars :minos noventa.

UNITED sTaTEs PATENT eownns;

p or MIiTNEAPpLrs, MINNESOTA, assreno or4 ONE-HALF To l scorn r. intens, onmNN-nAroLIs, MINNESOTA. f i

. annoncen-CONCRETE BUILDING.

Specification of Letters Patent.

Patented Nev.1v1, 1913.

Application aiea'uovemberaa 19'10. serial No. senesi. f

` Toi all 1'whom it" concern Beit known that' I, WiLmAiu Pinnen -Cowtlns`," of" Minneapolis, county of Henneand State of Minnesota, have invented dertain Improvements in Reinforced-Concrete Buildings, of which the following is a, specification.

Thi'siinve'ntion relates to improvements in Building construction of reinforced concrete a'nd the objects I have in. view are to fpro vide a building inl which reinfdrced flat `slabs' constituting the floors of the building faire formed' integrally with reinforced con crete supporting' columns, Iand are reinforcedby brackets within th said flat slabs l and radiating from the colu n centers and byf which' the tension and shear stress are 'describedV and" particularly pointed out in carried;

The invention consists generally in the constructions and combinations hereinafter the' claims.

i andv supporting column, the righthand half Inl the accompanying drawings forming part oft tlnsspeciication, Flgure 1, isa verticaljsection through a portion of a flat slab shown in section so as to show clearly the i 'is a plan` view, showing` the arrangement Vals arrangement `of the reinforcing rods. Fig. 2

of the column rods, thel brackets, and the rings. Fig. 3 is a' plan .view showing thecomp'lete arrangement ofA the slab rods and their rel ation to the. columns and brackets. r

In all of the drawings, 9.2 represents the column rods, which extendy vertically through the building, said rods being formed in suitable sections or lengths, and

said sections being arranged in line withV one another, and' if preferred being provided with suitable means for securing the sections together.

4- preferably wound spirally around the series of column rods, and said column rods and the spirally arranged enveloping rods are embedded in concrete in the usual manner, thereby forming a reinforced column of any `suitable site and of'any desired strength.

d A t the line of the floor slab I prefer to provide a series of radiating brackets 4, each bracket being formed of a substantially U- shaped rod with out-turned ends 5 and 6.

' These brackets are arranged to project radially from the column centers with the two branches of the 'U in afsu'bstantially vertical plane and with the lout-turneduends A rod, or wire, 3' is projecting downwardv andl upward` inthe center of the column. y I have shown inFig.

2 of the dra-wings eight ofthesebrackets,

but a greater or less number may be used. r 1 lhey may be of any suitable lengths, and

'widths 'and formed of rods ofvany suitable size. Eachof the/*rods 5 and 6 issliown projecting lengthwise of the column, a distance substantially equal vto the thickness ofthe floor slab, but this distance may be increased or diminished as found desirable. The vertically'extending. rods 5 and 6 :are brought together in the central portion of the column and are surrounded by rings 7. I prefer also to surround the column rods by rings 8 arranged above and below each ofthe brackets 4', and Ialso prefer to proridea winding of wire 9 around the mem-4 bers of each bracket-,Aas shown in Fig. 1 of the drawings. Within the U-sliaped bracket and at the outer end thereof, `I provide a large ring 10, preferably formed lof a rod bent into a circular iigurevas shown. in Fig. of the drawings, with its ends .overlapping and "lashed'together by wires 11. Any'other suitable means for securingtlieends of the rings may b'e employed in place ofwthat herein shown and described.l I also prefer to provide on topof the series of brackets an additional ring 1Q.. `This ringis preferably arranged to cross the bracketfat or near its outer end. I may also provide an intermediateI ring 13 preferably arranged at aboutth'e middle of the braclcets and also preferablyv arranged on t'op of' said brackets. Slab' rods 14? are arrangedl to pass over the brackets andr over the rings 12' and 13, and

through the column as indicated in Fig. 3 ofI the draWings:Y Therrings'10;4 12 and li'I designate buckle rings as they-assist in re sisting'the tension or tendency of the floor slab tobuckle or bend downward. The wires 9 wound around the members of the brack ets I designate shear loops, as they tend to resist the shear in theslab.

Each of, the brackets .et forms, in elfect, a

`fixed girder havingone free end and, therefore, acting as a' cantaliver and receiving ywithin the Hoor slab, thus giving a, level and even surface above and below each-slab,

' directly to the reinforced column. This con`- struction is also very cheap 'and easy to erect, the brackets and the buckling ringsgfv` beingformed of wire rods, may be bent t0' shape on the work, and it is not necessary to provide any especially constructed rein-,y

forcingf members, the whole reinforcement being secured by means of rods and the bands or rings 7 and 8. The building constructor is, therefore, not required to pro# vide especlally constructed reinforcing devices that must be formed` or made up at a factory or'work shop and brought to the lplace of erection' in a nished state. `Itis only necessary to provide rods of suitable size and the necessary number of rings 7 and 8 and then with suitable tools the brackets and the rin s 10 and 13 may be formed atl the place o erection.

Thedetails of the'construction may be" varied in many particulars without departing from my invention.

i I claimas my invention:

l. In a reinforced concrete building structure, the combination with reinforced concrete columns and a floor `slab of concrete. supported thereby, of aseries. of closely spaced U-sliaped brackets arranged in vertical planes, and extending in a .radial direction from each of the column centers into the ioor slab, the inner v.free ends of the brackets being bent to extend longitudinally of the columns and located substantially in the center of the columns, means for engaging the bent ends 'of the brackets for. holding the same together, vertically extending column rods located in each column adjacent the outer face thereof, and rings surroundling said column rods and located above and below the members ofthe brackets.

2. In areinforced `concrete building struc--v ture, the combination with reinforced concrete columns and a floor slab of concrete supported thereby, of y"a series of closely brackets.

.noreste spaced U-shapednbrackets arrailgdd in. tertical planes,l and extendin' in a radial di,-

rection from sach of the co umn centers ifit'o the floor slab,` thelinner free ends vfof the brackets being bent to extend longitudinally of the columns,and located substantially 1n the center of ,the'columna means for engaging the bent ends of the brackets for holdking the same together, vertically extending column rods located in each column adjacent the outer face thereof, rings surrounding said column rods and located above and below the members of the brackets, and a plurality of buckling ringsarranged concentrically of said columns, and locatedbei tween the upper and lower members of 3. In a reinforced concrete building structure, the combination with reinforced concrete columns and a floorv slab of con-.-

crete supported thereby, Vof a series of closely spaced U-shaped brackets arranged in vertical planes, and'extending in a radial direction from each of the column centers into the door slab, the inner free ends of the brackets being bent to extend longitudinally of the columns, and located substantially in the center of the columns, means for engaging the bent ends of the brackets for holding the same together, vertically extending column rods located in each column adja- Vcent the outer face thereof, rings surrounding said column rods and located above and belowthe members of the brackets, a plural- 'ity of buckling rings arranged concentri- -cally of said columnsan'd located between WILLIAM lPIER-CE COVLES. Y

Witnesses: l

GENEVIEVE E. SORENSEN, EDWARD A. PAUL'. 

